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27 lines
795 B
27 lines
795 B
#include <bits/stdc++.h>
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using namespace std;
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int n; //n次操作
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int opt; //操作指令
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int length; //木材长度
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set<int> ds; //集合，红黑树,平衡二叉树
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int main() {
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cin >> n;
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while (n--) {
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cin >> opt >> length;
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if (opt == 1) {
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if (ds.find(length) != ds.end()) cout << "Already Exist" << endl;
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else ds.insert(length);
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} else if (ds.empty())
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cout << "Empty" << endl;
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else {
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auto i = ds.lower_bound(length), j = i; //复制出来一个迭代器j
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if (j != ds.begin()) j--;//前一个
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if (i != ds.end() && length - (*j) > (*i) - length) j = i;
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cout << (*j) << endl;
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ds.erase(j);
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}
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}
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return 0;
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} |